[Rpm-maint] [rpm-software-management/rpm] Use int64_t for lengths (#1492)

Demi Marie Obenour notifications at github.com
Fri Feb 19 08:53:45 UTC 2021


@DemiMarie commented on this pull request.



> @@ -467,15 +468,14 @@ static int dataLength(rpm_tagtype_t type, rpm_constdata_t p, rpm_count_t count,
 	break;
 
     default:
-	if (typeSizes[type] == -1)
-	    return -1;
-	length = typeSizes[(type & 0xf)] * count;
-	if (length < 0 || (se && (s + length) > se))
+	/* this won’t overflow, since ‘long_count’ is 64-bit */
+	length = typeSizes[type] * long_count;
+	if (length <= 0 || (se && length > se - s))

I went with making `typeSizes` 64-bit, which will help prevent similar problems elsewhere.

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